Issue when there is no overflow

For example, in the official demo, if there are only two or three List items, when you drag the lower portion of the content, the usual whole page drag occur.

The ideal behaviour is that the toolbar would still stay top while the remaining page is dragged elastically.

Start by running the official demo with only two or three List items and reproduce the drag from the lower content area. Read the JavaScript library's drag and toolbar behavior, then verify that the toolbar remains at the top while the remaining page drags elastically without overflow.

Written by the indexing model from the issue text.